RSI explained: momentum, divergence, at 70/30 myth

Sinusukat ng relative strength index ang bilis ng price moves. Ganito basahin nang tama — at bakit ang “sell at 70” ang pinaka-mahal na oversimplification sa retail trading.

Na-update July 2026 · 9 minutong pagbasa

Ano talaga ang sinusukat ng RSI

RSI compares the average size of recent up-moves against recent down-moves and compresses the result into a 0–100 scale. Above 70 is conventionally “overbought”, below 30 “oversold”. What it really measures is momentum — how one-sided the last N bars have been.

RSI = 100 − 100 / (1 + avg gain / avg loss)

PriceRSI 14Overbought 70Oversold 30

Presyo na may RSI 14 sa ibaba — ang shaded band ay 30–70 neutral zone. · Illustrative data — past performance is not a reliable indicator of future results.

Ang 70/30 myth

In a strong uptrend, RSI can sit above 70 for weeks while price doubles. Selling the first overbought reading is how traders short the strongest markets on the chart. Overbought means the move is fast — it does not mean the move is over.

Rule that survives contact with real markets: in an uptrend, treat RSI dips toward 40–50 as pullback buy zones. Reserve the classic 70/30 reversal reading for ranging markets.

Divergence — pinaka-mataas na value na signal

When price makes a new high but RSI makes a lower high, the move is running on fewer participants — bearish divergence. New price low with a higher RSI low is bullish divergence. Divergences don't time the turn precisely, but they flag exhaustion earlier than any crossover.

Confirm divergence with structure: wait for the trendline or last swing to actually break.
Higher timeframes produce more reliable divergences than 1-minute noise.
Combine with the 50-EMA trend filter to avoid counter-trend knife-catching.